IUPAC Green Book[3] in that, in terms of its definition [4], pH = âlg a. H. it involves a single ion quantity, the activity of the hydrogen ion, which is immeasurable by any ther-. modynamically valid method and requires a convention for its evaluation.
The series officially premiered on July 17, 1999. It has received worldwide critical acclaim since its premiere and gained enormous popularity by its second season. A feature film, The SpongeBob SquarePants Movie, was released in theaters on November 19, 2004, and a sequel was released on February 6, 2015.
On April 12, 2012, SpongeBob aired its 174th episode and has produced 204 episodes, and more episodes will be produced, marking it as the first Nicktoon to have 200 or more episodes. On July 21, 2012, SpongeBob was renewed and aired its ninth season.